Greetings,
First off let me say that I do not cast my own lead bullets - I know shame on me anyway I have in the recent past used bullets by "Stuer's Choice" however they have discontinued their line of LSWC bullets. I have recently run out of my stash of these LSWC's for my 38 special/357 magnum so I have been on the hunt for another source. These lead bullets were fine for punching wholes in paper but still just a bit inconsistent... but they were cheap. Perhaps that falls under the category of "you get what you pay for"?

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"Given adequate penetration, a larger diameter bullet will have an edge in wounding effectiveness. It will damage a blood vessel the smaller projectile barely misses. The larger permanent cavity may lead to faster blood loss. Although such an edge clearly exists, its significance cannot be quantified".

Do a search in this forum on Glocks & lead ammo and you'll find many threads on this subject. I have only shot about 200 rounds or so through my G21 (no issues) but that is hardly something to say "it is totally safe."

Colorado4wheel has most likely the best advise; "You won't know till try them in your barrel."

Let us know how it works for you.

__________________"A man can never have too much red wine, too many books, or too much ammunition"
óRudyard Kipling

Anyway I was wondering - If you are not casting your own, who's lead bullets do you use? and why? Is it price or performance?

I did the same search as you a few months ago. Missouri Bullet Co. is always mentioned, and nearly always highly recommended.

I like the fact Missouri Bullet Co offers a wide range of choices, even within specific caliber projectiles. Orders ship on time, no lengthy waits. Pricing is competitive.

My experience with their 115gr. 9mm LRN, 158gr .357 LSWC, and 230gr. .45 ACP LRN is positive. If I do my job right, the projectiles do their job.

I'm trying out some Bear Creek 230gr Moly coated .45 ACP LRN's. They're ok so far. Less smokey than a lubed cast projectile. I'm still on the fence on them. Moly is hygroscopic & needs to be cleaned out after every range trip. I've noticed that it takes a little longer to clean the bore after using moly projectiles.

If I leave some moly behind in the bore, there is a possibility of rust due to moly being hygroscopic. I don't have that same worry when shooting a regular lead hard cast projectile.

EDIT TO ADD:

I don't own any firearms with a polygonal rifled barrel. The generally accepted rule is not to fire non-jacked ammo from a polygonal rifled barrel. If you do, lead build up will lead to a catastrophic failure.

Some individuals fire non-jacketed ammo through a polygonal rifled barrel and claim that there is no problem.

I have been shooting lead bullets in my 17, 26, and 21 for some time now with no issues at all...after 2-3 hundred the stock barrels look dirty but after a dozen strokes of the bronze brush and Shooters Choice lead remover followed by a clean patch,,spotless clean barrels...no problem...My bullets are from Renegade bullets in Boerne, TX...830-446-2123...$35 for 500 .45's...